如何添加附件（Java）

附件 (Attachment)

在Foxit PDF SDK中，attachments指的是文档附件而不是文件附件注释。它允许将整个文件封装在文档中，就像电子邮件附件一样。Foxit PDF SDK提供应用程序APIs来访问附件，例如加载附件，获取附件，插入/删除附件，以及访问附件的属性。

Example:

如何从PDF文档中导出嵌入的附件文件，并将其另存为单个文件

import com.foxit.sdk.PDFException;
import com.foxit.sdk.common.Library;
import com.foxit.sdk.pdf.Attachments;
import com.foxit.sdk.pdf.FileSpec;
import com.foxit.sdk.pdf.PDFDoc;
import com.foxit.sdk.pdf.objects.PDFNameTree;
...

PDFNameTree empty_nametree = new PDFNameTree();
{          
    // Get information of attachments.
    Attachments attachments = new Attachments(doc, empty_nametree);
    int count = attachments.getCount();
    for (int i = 0; i < count; i++) {
        String key = attachments.getKey(i);

        FileSpec file_spec = attachments.getEmbeddedFile(key);
        if (!file_spec.isEmpty()) {
            String name = file_spec.getFileName();

            if (file_spec.isEmbedded()) {
                String export_file_path = output_path + name;
                file_spec.exportToFile(export_file_path);
            }
        }
     }
}

如何删除PDF文档中所有的附件文件

import com.foxit.sdk.PDFException;
import com.foxit.sdk.common.Library;
import com.foxit.sdk.pdf.Attachments;

import com.foxit.sdk.pdf.PDFDoc;
import com.foxit.sdk.pdf.objects.PDFNameTree;
...

// Assuming PDFDoc doc has been loaded.

PDFNameTree empty_nametree = new PDFNameTree();
{          

    // Get information of attachments.
    Attachments attachments = new Attachments(doc, empty_nametree);
    attachments.removeAllEmbeddedFiles();
}    
...